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Elements, Compounds, and Mixtures

Elements, Compounds, and Mixtures. MATTER. Matter can be split into three different groups: Elements Compounds Mixtures. Matter is :. Anything that has MASS and VOLUME. ELEMENT. Definition: A pure substance that is made of only a single type of atom.

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Elements, Compounds, and Mixtures

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  1. Elements, Compounds, and Mixtures

  2. MATTER Matter can be split into three different groups: Elements Compounds Mixtures Matter is : Anything that has MASS and VOLUME

  3. ELEMENT Definition: A pure substance that is made of only a single type of atom. Examples: Gold, Iron, Aluminum, Oxygen SEPARATING ELEMENTS: Cannot be broken apart under normal lab conditions. (heating, exposure to acids, exposure to electricity)

  4. COMPOUND Definition: A single molecule of two or more ELEMENTS in fixed amounts. Properties are different than the elements that make it. Examples: Salt, Sugar, Vinegar, Glass, Water SEPARATING COMPOUNDS: Takes a HUGE amount of energy. Needs to be done chemically.

  5. Molecule Definition: smallest piece of a compound that maintains its properties.

  6. MIXTURE Definition: Combination of: two or more elements OR two or more compounds OR elements and compounds ***individual ingredients KEEP THEIR PROPERTIES ***mixtures are NOT pure substances SEPARATING MIXTURES: Easily separated physically (evaporation, strainer, pick out pieces, etc.) Properties of a mixture VARY. (different throughout)

  7. Salad Soil Water (H2O) Salt and pepper Oxygen Ocean Water Air Vinegar and oil TRY IT OUT Which is a mixture? Which is a compound?

  8. Two types of MIXTURES • Heterogeneous • Unevenly mixed • Does not appear to be the same throughout • Most mixtures are heterogeneous EXAMPLES: Sand, Trail Mix, Salad Dressing • Homogeneous • Evenly mixed • Appears to be the same throughout EXAMPLES: Saltwater, Syrup

  9. Homogeneous vs. Heterogeneous

  10. mixtureof elements ME element E mixtureof elements/compounds MEC mixture of compounds MC compound C element E mixture of elements/compounds MEC mixture of compounds MC compound C

  11. vinegar silicon dioxide (glass) baking soda sodium chloride (table salt)

  12. The Big Idea The Big Idea: atoms (elements) molecules (compounds) group together (in different combinations) to form mixtures Combine to form

  13. ECM Station Activity • You will travel to different stations today. • At each station, there is a substance. • For each station: • Table # • Identify object (what is it?) • E,C,M (element, compound, mixture?) • WHY? (what property/characteristic makes it an E,C, or M?

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